Re: BUG #15857: Parallel Hash Join makes join instead of exists

From: Thomas Munro <thomas(dot)munro(at)gmail(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: krujkov(at)gmail(dot)com, PostgreSQL mailing lists <pgsql-bugs(at)lists(dot)postgresql(dot)org>
Subject: Re: BUG #15857: Parallel Hash Join makes join instead of exists
Date: 2019-06-18 13:56:40
Message-ID: CA+hUKGJ0rMb0NPGSVZk0bWcLNs7otUSWgqLEOzQUhCwGEmnfDw@mail.gmail.com
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On Wed, Jun 19, 2019 at 1:17 AM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> It seems a little weird to make the join-type test be the first one
> in the if() condition: it doesn't seem like the most important thing
> to test, and it doesn't agree with the way you've worded the comment.
> Otherwise +1.

Thanks for the fast review. Updated. I'll default to waiting until
after I see the tags for the release that's in progress unless you
think it should be included.

--
Thomas Munro
https://enterprisedb.com

Attachment Content-Type Size
0001-Prevent-Parallel-Hash-Join-for-JOIN_UNIQUE_INNER-v2.patch application/octet-stream 1.5 KB

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